Feeding air device for furnaces.



Patented Got. 9, I900.

No. 659,3l2.

.P. MATHIAS.

FEEDING AIR DEVICE FOR FURNACES.

(Application filed Apr. 30, 1900.) (No Model.)

4, W0 I I I/ l I I 1' UNITED. STAIES PATENT OFFICE.

PAUL MATHIAS OF LEBERAU, GERMANY.

FEEDING AIR DEVICE FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 659,312, dated October 9, 1900.

Serial No. 14,862. (No model.)

To ctZZ whom it mag concern:

Be it known that I, PAUL MATHIAS, a citizen of the German Empire, residing at Leberau, in the Province of Alsace, Germany, have invented a new and useful Feeding Air Device for Furnaces, of which the followingis a specification.

My invention concerns the better utilization of fuel by a complete combustion of the unconsumed elements of the fire-gases coming from the fire-grate.

According to this invention the fire-gases leaving the grate will be held back as required by the hollow bridge-wall and mixed with superheated air at the place where confined.

Figure 1 is a View in longitudinal section of the apparatus. Fig. 2 is a sectional view on the line A B of Fig. 1. Fig. 3 is a detail View on the line C D of Fig. 2.

A part of the air entering at a is drawn past the tongue I) and the detached cast-iron concave hollow bridge-wall d, standing at c. The greater portion reaches e under the rear part of the grate. A smaller portion rising through fluesfof the hollow bridge wall in the sides of the furnace streams into a hollow arch g for distributing heated air. This hollow arch further heats the already greatly heated air and mixes it with the compressed fire-gases, whereby their unconsumed elements are entirely consumed behind the hollow bridge-wall.

By an arrangement of levers consisting of a double-armed lever h and the prop-lever 1', 011 which rests the hollow bridge-wall d, with its inside knobs Zr; in front, the hollow bridgewall can be lifted, and thesmoke-gases can by contracting the opening between the bridgewall and the arch be retained at the lower part of their U-shaped outlet during their proper intermixing with the superheated air led thither.

Of particular importance is the arrangement of the hollow arch g for distributing heated air. In its hollow interior, which is solidly narrowed downward and open for the exit of the air, partitions ZZZ are constructed. These have the object to make as complete as possible the distribution of the air and the mixing of the fire-gases with this previously heated air led into the distributing hollow arch above the movable bridge-wall.

What I claim, and desire to secure by Letters Patent of the United States, is-

The combination with a furnace, of a hollow bridge-wall, a hollow arch 9 located above the bridge-wall, flues f connecting the arch and the bridge-wall, partitions Z in the arch g for distributing the heated air, and means for raising and lowering the bridge-wall, in order to contract and enlarge the opening between the bridge-wall and the arch.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PAUL MATHIAS.

Witnesses AUGUST THORTE, ERNST OHAMLEY. 

